Change initDataType and sessionType to be enums

Source/web/WebMediaPlayerClientImpl.cpp

Index: Source/web/WebMediaPlayerClientImpl.cpp
diff --git a/Source/web/WebMediaPlayerClientImpl.cpp b/Source/web/WebMediaPlayerClientImpl.cpp
index c25c4a808fa1d8472480ac26cd1f7999ad3d7f9d..0044038de6f867cf606dc046e53eca18ea990b43 100644
--- a/Source/web/WebMediaPlayerClientImpl.cpp
+++ b/Source/web/WebMediaPlayerClientImpl.cpp
@@ -123,11 +123,27 @@ void WebMediaPlayerClientImpl::keyMessage(const WebString& keySystem, const WebS
     HTMLMediaElementEncryptedMedia::keyMessage(mediaElement(), keySystem, sessionId, message, messageLength, defaultURL);
 }
 
-void WebMediaPlayerClientImpl::encrypted(const WebString& initDataType, const unsigned char* initData, unsigned initDataLength)
+void WebMediaPlayerClientImpl::encrypted(WebEncryptedMediaInitDataType initDataType, const unsigned char* initData, unsigned initDataLength)
 {
     HTMLMediaElementEncryptedMedia::encrypted(mediaElement(), initDataType, initData, initDataLength);
 }
 
+// FIXME: Remove this once Chromium updated to use enum type.
+void WebMediaPlayerClientImpl::encrypted(const WebString& initDataType, const unsigned char* initData, unsigned initDataLength)
+{
+    WebEncryptedMediaInitDataType newInitDataType;
+    if (initDataType == "cenc") {
+        newInitDataType = WebEncryptedMediaInitDataType::Cenc;
+    } else if (initDataType == "webm") {
+        newInitDataType = WebEncryptedMediaInitDataType::Webm;
+    } else if (initDataType == "keyids") {
+        newInitDataType = WebEncryptedMediaInitDataType::Keyids;
+    } else {
+        newInitDataType = WebEncryptedMediaInitDataType::Unknown;
+    }
+    HTMLMediaElementEncryptedMedia::encrypted(mediaElement(), newInitDataType, initData, initDataLength);
+}
+
 void WebMediaPlayerClientImpl::didBlockPlaybackWaitingForKey()
 {
     HTMLMediaElementEncryptedMedia::didBlockPlaybackWaitingForKey(mediaElement());